Contacts of the helix formed by residues 390 - 413 (chain C) in PDB entry 3IFS


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with ASN 390 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95C  MSE      5.5     0.2    -      -       -      +
     96C  LEU*     3.6    12.4    -      -       -      +
    388C  GLU*     3.3    34.8    +      -       +      +
    389C  LEU*     1.3    75.0    -      -       -      +
    391C  GLU*     1.3    67.1    +      -       -      +
    392C  TYR*     3.6     9.6    +      -       -      +
    393C  THR*     2.7    39.0    +      -       -      -
    394C  PHE*     2.9    28.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 391 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96C  LEU*     4.0    15.7    -      -       +      -
    224C  GLY      4.9     0.5    -      -       -      +
    225C  LEU*     3.6    27.1    -      -       +      +
    226C  ASN*     2.9    54.6    +      -       -      +
    229C  GLU*     4.2     5.2    -      -       +      +
    230C  MSE      3.4    22.2    -      -       +      +
    390C  ASN*     1.3    79.0    -      -       -      +
    392C  TYR*     1.3    68.1    +      -       -      +
    394C  PHE*     3.2     3.8    +      -       -      +
    395C  GLY      3.0    18.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 392 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3C  THR*     5.1    13.2    -      -       -      -
    229C  GLU*     3.3    34.7    +      -       +      +
    232C  LYS*     3.8    14.1    -      -       +      -
    233C  GLY*     3.3    38.0    -      -       -      -
    236C  ALA*     3.2    20.5    -      -       +      +
    390C  ASN*     3.4    10.4    +      -       -      +
    391C  GLU*     1.3    78.5    -      -       -      +
    393C  THR*     1.3    72.7    +      -       -      +
    395C  GLY      3.2     2.4    +      -       -      -
    396C  TYR*     3.0    31.4    +      +       +      +
----------------------------------------------------------
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Residues in contact with THR 393 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3C  THR      4.9     8.3    +      -       -      +
      5C  VAL*     3.8    18.2    -      -       +      -
    386C  ILE*     3.4    33.0    -      -       +      -
    387C  PRO*     4.4     6.4    -      -       +      +
    388C  GLU*     3.2    17.7    +      -       -      +
    389C  LEU*     5.5     0.4    -      -       +      -
    390C  ASN*     2.7    26.8    +      -       -      -
    392C  TYR*     1.3    85.2    -      -       -      +
    394C  PHE*     1.3    56.0    +      -       -      +
    396C  TYR*     3.2     5.3    +      -       -      +
    397C  LEU*     2.8    31.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 394 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88C  GLY*     4.0    10.8    -      -       -      -
     91C  ALA*     4.3     2.7    -      -       +      -
     92C  ALA*     3.5    39.0    -      -       +      -
     95C  MSE      3.8    28.7    -      -       +      -
     96C  LEU*     4.1    10.8    -      -       +      -
    211C  VAL*     4.3    13.7    -      -       +      -
    212C  LEU*     5.0     1.6    -      -       +      -
    230C  MSE      3.6    30.1    -      -       +      -
    281C  PHE*     3.9    24.7    -      +       -      -
    284C  TRP*     6.2     1.8    -      +       -      -
    390C  ASN      2.9    14.6    +      -       -      +
    391C  GLU*     3.2     7.4    +      -       -      +
    393C  THR*     1.3    74.9    -      -       -      +
    395C  GLY*     1.3    58.0    +      -       -      +
    397C  LEU*     3.4     6.3    +      -       -      +
    398C  VAL*     2.9    51.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 395 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    212C  LEU*     5.0     2.7    -      -       -      -
    230C  MSE      3.4    29.8    -      -       -      -
    234C  ALA*     3.5    20.9    -      -       -      +
    391C  GLU      3.0    10.5    +      -       -      -
    392C  TYR      3.2     1.5    +      -       -      -
    394C  PHE*     1.3    76.2    -      -       -      +
    396C  TYR*     1.3    65.5    +      -       -      +
    398C  VAL*     3.5     4.7    +      -       -      +
    399C  TYR      3.1    17.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 396 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3C  THR      6.1     0.2    -      -       -      -
      4C  HIS*     3.0    21.9    -      +       -      -
      5C  VAL*     3.6    42.3    +      -       +      -
    233C  GLY*     3.4    24.0    -      -       -      +
    234C  ALA*     4.4     0.7    -      -       -      +
    236C  ALA*     3.8    12.3    -      -       +      -
    237C  GLY*     3.6    17.5    -      -       -      -
    240C  ASP*     2.8    33.7    +      -       -      +
    241C  PHE*     3.6    28.8    -      +       -      -
    392C  TYR*     3.0    21.8    +      +       +      +
    393C  THR*     3.5    11.9    -      -       -      +
    395C  GLY*     1.3    74.8    -      -       -      +
    397C  LEU*     1.3    56.9    +      -       -      +
    399C  TYR*     3.3     5.5    +      -       -      +
    400C  PHE*     2.9    25.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 397 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5C  VAL*     4.1    16.4    -      -       +      +
     95C  MSE      4.7    13.2    -      -       +      -
    281C  PHE*     3.7    33.7    -      -       +      -
    330C  LEU*     5.0     0.7    -      -       +      -
    384C  VAL*     4.0    22.0    -      -       +      -
    386C  ILE*     3.6    31.9    -      -       +      -
    393C  THR*     2.8    20.8    +      -       +      +
    394C  PHE*     3.7     6.1    -      -       -      +
    396C  TYR*     1.3    72.2    -      -       -      +
    398C  VAL*     1.3    64.6    +      -       -      +
    400C  PHE*     3.3     7.7    +      -       +      +
    401C  PHE*     3.1    49.7    +      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 398 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    211C  VAL*     3.8    18.6    -      -       +      -
    212C  LEU*     4.1    14.6    -      -       +      -
    281C  PHE*     4.3     6.7    -      -       +      -
    284C  TRP*     3.8    22.7    -      -       +      -
    394C  PHE*     2.9    54.7    +      -       +      +
    395C  GLY*     3.7     4.5    -      -       -      +
    397C  LEU*     1.3    75.3    -      -       -      +
    399C  TYR*     1.3    59.1    +      -       -      +
    401C  PHE      3.4     1.4    +      -       -      -
    402C  GLU*     2.9    57.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 399 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36C  HIS*     5.3     0.3    -      -       -      -
     48C  TRP*     3.7    19.5    -      +       -      -
     49C  VAL*     2.7    44.1    +      -       -      +
     52C  PRO*     3.8    22.4    -      -       +      -
    212C  LEU*     5.3     2.0    -      -       +      -
    234C  ALA*     3.9    13.9    -      -       +      +
    237C  GLY*     3.6     9.9    -      -       -      -
    238C  ARG*     3.4    36.1    +      -       +      +
    241C  PHE*     4.1     5.4    -      +       +      -
    395C  GLY      3.1    15.5    +      -       -      +
    396C  TYR      3.7     3.8    -      -       -      +
    398C  VAL*     1.3    77.1    -      -       +      +
    400C  PHE*     1.3    66.2    +      -       -      +
    402C  GLU*     3.8    13.4    -      -       -      +
    403C  LYS*     2.9    50.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 400 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5C  VAL*     5.0     9.2    -      -       +      -
      6C  THR      5.7     0.2    -      -       -      -
      7C  PHE*     4.1    18.8    -      +       +      -
    241C  PHE*     3.6    35.8    -      +       +      -
    250C  PRO*     3.7    13.7    -      -       +      -
    251C  ALA*     3.7    26.6    -      -       -      +
    254C  TYR*     4.1    25.4    -      +       +      -
    384C  VAL*     4.2    14.8    -      -       +      -
    396C  TYR*     2.9    16.7    +      -       +      +
    397C  LEU*     3.4    16.2    -      -       +      +
    399C  TYR*     1.3    75.6    -      -       -      +
    401C  PHE*     1.3    97.7    +      +       -      +
    403C  LYS      3.6     0.2    +      -       -      -
    404C  ALA*     3.0    29.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 401 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    254C  TYR*     3.7    32.5    -      +       -      -
    271C  LEU*     4.5     6.1    -      -       +      -
    281C  PHE*     3.7    30.3    -      +       -      -
    284C  TRP*     4.0     6.5    -      +       +      -
    285C  TRP*     3.7    28.3    -      +       -      -
    288C  LEU*     3.5    16.7    -      -       +      +
    289C  PHE*     3.8     5.0    -      +       -      -
    328C  THR*     5.2     0.2    -      -       +      -
    330C  LEU*     4.0    20.0    -      -       +      -
    384C  VAL*     4.3     7.0    -      -       +      -
    397C  LEU*     3.1    40.4    +      -       +      +
    398C  VAL      3.9     3.1    -      -       -      +
    400C  PHE*     1.3    94.9    -      +       -      +
    402C  GLU*     1.3    59.2    +      -       -      +
    404C  ALA*     3.8     2.0    -      -       -      +
    405C  CYS*     2.9    31.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 402 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48C  TRP*     3.6    31.8    -      -       +      +
    209C  PHE*     3.6    53.8    -      -       +      +
    211C  VAL*     4.3     4.3    -      -       -      +
    212C  LEU*     5.1     5.4    -      -       -      +
    284C  TRP*     4.1    17.0    -      -       +      -
    288C  LEU*     4.0     8.3    -      -       +      -
    398C  VAL*     2.9    41.3    +      -       -      +
    399C  TYR*     3.8    15.1    -      -       -      +
    401C  PHE*     1.3    75.2    -      -       -      +
    403C  LYS*     1.3    63.3    +      -       -      +
    405C  CYS*     3.2     3.3    +      -       -      +
    406C  ALA      3.1    18.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 403 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32C  HIS*     4.1     0.2    +      -       -      -
     35C  ILE*     4.4    11.6    -      -       +      +
     36C  HIS*     3.0    32.3    +      -       -      -
     48C  TRP*     4.0    21.3    -      -       +      -
     49C  VAL*     4.3     5.8    -      -       -      -
    238C  ARG      5.9     0.4    -      -       -      -
    241C  PHE*     2.8    36.8    +      -       +      +
    251C  ALA*     4.3     7.0    -      -       +      -
    252C  TYR*     2.7    38.8    +      -       +      +
    399C  TYR*     2.9    41.5    +      -       +      +
    400C  PHE      4.1     2.5    -      -       -      +
    402C  GLU*     1.3    76.8    -      -       -      +
    404C  ALA*     1.3    63.3    +      -       -      +
    406C  ALA*     3.4     3.6    +      -       -      +
    407C  MSE      3.3    21.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 404 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    251C  ALA*     3.3    30.7    -      -       +      +
    254C  TYR*     3.7    27.4    -      -       +      -
    255C  ALA*     3.5     5.6    -      -       -      +
    289C  PHE*     4.5     0.7    -      -       -      -
    400C  PHE*     3.0    20.7    +      -       +      +
    401C  PHE*     3.8     5.2    -      -       -      +
    403C  LYS*     1.3    75.5    -      -       -      +
    405C  CYS*     1.3    58.8    +      -       -      +
    407C  MSE      3.4     2.1    +      -       -      -
    408C  SER*     2.9    31.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with CYS 405 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    209C  PHE*     4.4     4.0    -      -       +      -
    288C  LEU*     3.6    27.6    -      -       +      -
    289C  PHE*     3.6    26.0    -      -       +      -
    292C  SER*     3.2    39.0    -      -       -      -
    293C  GLU*     4.5     1.9    -      -       -      +
    401C  PHE      2.9    18.0    +      -       -      +
    402C  GLU      3.2     5.6    +      -       -      +
    404C  ALA*     1.3    76.0    -      -       -      +
    406C  ALA*     1.3    61.8    +      -       -      +
    408C  SER*     3.2     1.4    +      -       -      -
    409C  GLY*     2.9    23.0    +      -       -      -
    416C  PRO*     4.7     1.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 406 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35C  ILE*     4.0    15.7    -      -       +      -
     48C  TRP*     3.8    26.9    -      -       +      -
    209C  PHE*     5.2     0.4    -      -       -      -
    402C  GLU      3.1     5.7    +      -       -      -
    403C  LYS*     3.7     8.5    -      -       -      +
    404C  ALA      3.3     0.2    -      -       -      -
    405C  CYS*     1.3    77.0    -      -       -      +
    407C  MSE      1.3    62.5    +      -       -      +
    409C  GLY      3.4     0.2    +      -       -      -
    410C  TYR*     3.1    30.2    +      -       -      -
    416C  PRO*     3.8     6.5    -      -       -      +
    417C  PHE*     3.8    25.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with MSE 407 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28C  VAL*     3.4    36.3    -      -       +      +
     31C  THR*     3.6    23.1    -      -       +      -
     32C  HIS*     3.8    12.3    -      -       -      +
     35C  ILE*     4.2     7.3    -      -       +      +
    252C  TYR*     3.6    52.5    -      -       +      +
    255C  ALA*     3.7    16.2    -      -       +      -
    403C  LYS      3.3     5.7    +      -       -      +
    404C  ALA      3.7     6.7    -      -       -      +
    406C  ALA*     1.3    78.6    -      -       -      +
    408C  SER*     1.3    58.0    +      -       -      +
    410C  TYR*     3.3     3.0    +      -       -      -
    411C  LEU*     2.9    53.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 408 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    255C  ALA*     3.6    18.1    -      -       -      +
    258C  ARG*     2.8    21.3    +      -       -      -
    259C  ASN*     3.2    22.0    +      -       -      +
    289C  PHE*     4.4     2.9    -      -       -      -
    293C  GLU*     2.4    26.6    +      -       -      +
    404C  ALA      2.9    18.6    +      -       -      -
    405C  CYS*     3.6     6.3    -      -       -      -
    407C  MSE      1.3    75.3    -      -       -      +
    409C  GLY*     1.3    57.7    +      -       -      +
    411C  LEU*     3.3     1.3    +      -       -      -
    412C  LEU*     3.0    25.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 409 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    293C  GLU*     3.3    13.2    +      -       -      -
    405C  CYS      2.9    16.0    +      -       -      -
    406C  ALA      3.9     0.9    -      -       -      -
    408C  SER*     1.3    77.7    -      -       -      +
    410C  TYR*     1.3    60.5    +      -       -      +
    412C  LEU*     3.3     2.1    +      -       -      +
    413C  GLY      3.2     5.2    +      -       -      -
    414C  VAL*     3.1    43.9    +      -       -      +
    416C  PRO*     4.1     9.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 410 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23B  TYR      5.6     1.6    -      -       -      +
     24B  LEU*     5.8     0.2    -      -       -      +
     31C  THR*     3.5    34.3    +      -       +      +
     34C  ALA*     5.3     4.9    +      -       +      -
     35C  ILE*     3.8    26.0    -      -       +      -
     40C  GLY*     3.7    15.4    +      -       -      -
     41C  ALA*     2.5    44.5    +      -       +      -
     42C  GLY      4.8     0.9    -      -       -      -
     43C  ASN      4.9     0.2    +      -       -      -
     46C  LEU*     5.0     6.1    -      -       +      +
    406C  ALA      3.1    24.3    +      -       -      +
    407C  MSE      3.8     0.7    -      -       -      +
    409C  GLY*     1.3    77.3    -      -       -      +
    411C  LEU*     1.3    61.7    +      -       -      +
    413C  GLY*     3.2    13.0    +      -       -      -
    414C  VAL      4.0     6.3    -      -       -      -
    416C  PRO*     3.6    13.0    -      -       +      +
    417C  PHE*     3.4    25.4    -      +       -      -
----------------------------------------------------------
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Residues in contact with LEU 411 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24B  LEU*     6.1     0.2    -      -       -      +
    263B  ASN*     5.6     0.7    +      -       -      -
     24C  LEU*     4.3    18.2    -      -       +      -
     27C  ALA*     4.4    19.3    -      -       +      -
     28C  VAL*     4.3     4.0    -      -       +      -
     31C  THR*     4.5     8.7    -      -       -      +
    255C  ALA      4.4     4.0    -      -       -      +
    256C  VAL*     3.8    35.2    -      -       +      +
    259C  ASN*     4.1    13.9    -      -       +      +
    407C  MSE      2.9    50.6    +      -       +      +
    408C  SER      3.8     3.8    -      -       -      +
    409C  GLY      3.3     0.2    -      -       -      -
    410C  TYR*     1.3    76.9    -      -       -      +
    412C  LEU*     1.3    61.1    +      -       -      +
    413C  GLY*     3.4     0.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 412 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24B  LEU*     5.4     0.5    -      -       -      +
    263B  ASN*     3.7    30.7    +      -       +      +
    259C  ASN*     3.6    17.7    +      -       -      +
    262C  TYR*     3.8    30.3    -      -       +      -
    293C  GLU*     3.9    39.7    -      -       +      +
    298C  LYS*     4.3    12.3    +      -       +      +
    299C  GLY*     4.1    14.1    -      -       -      +
    300C  ILE      5.4     0.4    -      -       -      +
    408C  SER      3.0    17.5    +      -       -      +
    409C  GLY      3.5     5.8    -      -       -      +
    411C  LEU*     1.3    76.5    -      -       -      +
    413C  GLY*     1.3    59.2    +      -       -      +
    414C  VAL*     4.0    16.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 413 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20B  GLU*     4.7     4.7    -      -       -      -
     23B  TYR*     3.5    22.6    -      -       -      +
     24B  LEU*     3.9    24.8    -      -       -      +
    296C  ASP*     4.7     2.6    -      -       -      +
    298C  LYS*     4.4    10.2    +      -       -      -
    409C  GLY      3.2     2.6    +      -       -      -
    410C  TYR      3.2     9.8    +      -       -      -
    411C  LEU      3.2     4.0    -      -       -      -
    412C  LEU*     1.3    79.6    -      -       -      +
    414C  VAL*     1.3    65.9    +      -       -      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il